18719620

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{21767}}^1$

素因数の和:21819

約数の個数: 24

約数和(自身を含む): 40227264

約数和(自身を除く): 21507644

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 215, 430, 860, 21767, 43534, 87068, 108835, 217670, 435340, 935981, 1871962, 3743924, 4679905, 9359810, 18719620]

約数ペア:

[(1, 18719620), (2, 9359810), (4, 4679905), (5, 3743924), (10, 1871962), (20, 935981), (43, 435340), (86, 217670), (172, 108835), (215, 87068), (430, 43534), (860, 21767)]